jenney



(No Model.) 2 Sheets-Sheet 2.

C. D. JENNEY.

CCMMUTATOR POR DYNAMO ELECTRIC MACHINES. No. 332,399. Patented Deo. 15, 1885.

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WTNESSES. IJVVEN'TOR.

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PER

ilNiTnn STATES CHARLES D. JENNEY, OF

PATENT @Trina INDIANAPOLIS, INDIANA.

COMMUTA'I'R FDR DYNAMO-LEGTRlC `iilClrllll.

PECIFICATION forming part of Letters Patent N0.. 332,399, dated Becem'ber l5, 1885.

Application filed July 20, 1855. Serial No. 172,055.

To all whom, it may concern:

Be it known that l, GHARLEs D. JENNEY, of the city of Indianapolis, county of Marion, and State of Indiana, have invented certain new and useful Improvements in Commutators, of which the following is a specification.

My said invention relates to dynamo-elec4 trie machines, electric motors, and such like apparatus; and it consists in the construction of the commutators therefor, and the method of attaching the wires of the armature to such commutators, whereby a strong, durable, and efficient commutator is produced with reliable and permanent electrical connections.

Referring to the accompanying drawings, which are made a part hereof, and en which similar letters of reference indicate similar parts, Figure l is a top or plan view of a dynamo-electric machine provided with a commutator embodying` my said invention; Fig. 2, a top or plan View cfs-aid commutator and one end ofthe armature; Fig. 3, a longitudinal vertical sectional view on the dotted line in Fig. 2; Fig. 4, atransverse sectional View, looking toward the end of the armature, partly from each of the dotted lines y y and fv rv,- and Fig. 5, a detail perspective view of that portion of the commutator where the wires from the armature connect therewith.

In said drawings the portions marked A represent the commutator; B, the shaft on which said commutator and the armature are mounted; C, said armature; D D', the shaftsupports, E, the rocker-arm carrying the rated from the others by thin sheets of insu-- lating material, the whole being secured together by bolts a5. It is preferred that these parts a* shall have tooth-like projections on their ends, as shown in Fig. 3, which enter corresponding cavities or depressions in the sheets of insulating material, and are thus held rmly therein. The parts c* and the sheets of insulating material between them (No modeLl extend up ou the side next the armature and form a flange, and into the outer portion of each of said parts is cut a slot, into which the ends c oi" the wires from the body of the armature are forced, said slots being formed of slightly less diameter than the wires, so that said wires in being'forced therein are flattened somewhat and brought into firm and permanent contact therewith. These ends c of these wires, one from the outer layer of one coil and the other from the inner layer of the adjacent coil, are twisted together for a distance between the coils of the armature and the commutator, as shown most plainly in Figs. 3 and 5, and the extreme ends are forced into the slots one on top of the other. After these wires are all in place a hemp cord or other suitable material, c', is wound around the outside of these several wires, and they are thus held from any accidental loosening by the centrifugal force or otherwise, and are also protected from dirt, which might otherwise get between them, and if of a metallic character thus short-circuit some of the coils` The outside of this cord, after being put in place, is preferably covered with shellac or some suchlike substance, as well as the coils of the armature itself. Besides the advantages described resultant upon this construction of the eommutator, and means of connecting the wires from the armature therewith, is the further advantage that when it is desired to disconnect said wires from said commutator it can easily be done by removing the cord c', and by use of a suitable tool prying the ends of the wires out of the slots, which, as will be readily seen, does not bend or break them or injure them in any manner, and they can therefore be removed and returned to position as many times as desired without destruction or deterioration.

rllhe other several parts of this machine are either of a well-known and understood construction or are the subjectmatter of other applications for Letters Patent, and will not therefore be further described herein.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is-

1. rlhe combination of a eommutator in which the conducting parts are slotted, an armature the ends of the wires of which lead to and enter said slots, and a nonconducting covering wound over the outside of said ends of wires, substantially as set forth.

v 2. The combination, ina commutator, of numerous insulated parts', each of which has a projecting portion, the end of which is slotted, said slots being of slightly less diameter than the armature-wires, whereby said armature-wires when placed therein will be attened and held into close and permanent contact therewith.

3. The combination, in a dynamo-electric machine, of the armature and the commutator, said commutator being constructed substantially as specified and provided with slots to receive the ends'oi the wires of the armature, and a wrapping or covering over the ends of said wires, whereby dirt is kept therefrom and from the interior of the armature.

CHARLES D. JENNEY. [n s] Witnesses:

C. BRADFORD, E. W. BRADFORD. 

